So, why after almost 30 years of Americans' weight ticking up the scale has it suddenly called for a national campaign to change?

Today, HBO is premiering its four-part series called "Weight of the Nation." A collaborative effort with the National Institutes of Health, Centers for Disease Control and Prevention and the Institute of Medicine, the series focuses on different issues surrounding the epidemic: consequences, choices, children in crisis and challenges.

John Hoffman, vice president of HBO Documentary Films and the executive producer of "The Weight of the Nation," told National Public Radio the documentary is "not a piece of journalism" but instead "a piece of public health."

"We really are informing people about all the issues that pertain to the health and future of this country," Hoffman said on NPR's "Science Friday" last week. "So much as sending up as many flares as possible and really igniting a conversation. It's going to take a long time to turn this around."

Interesting facts from the documentary:

• One out of 5 of kids drink three or more sugar-sweeted beverages per day, accounting for an extra meal.

• Less than 1 percent of Americas meet the criteria for ideal cardiovascular health.